Gymnocranius satoi


Blacknape large-eye bream
Characteristic features:
Colour:

Silvery, scales on back with distinct blackish spot, black streak above eye and black bar usually below eye; blue speckles somtimes on snout and cheek; most fins reddish to bright red.

Size:

Up to 45 cm TL.

Distribution:

West Pacific, in torpical waters.

Habitat:

Sand and rubble bottoms, 15–40 m depth.

Biology:

Feeds on small bottom dwelling gastropod molluscs.

Indonesian fisheries:

Caught with bottom longlines and handlines.

Similar species:

Gymnocranius elongatus
Forktail large-eye bream

Gymnocranius elongatus

Gymnocranius elongatus differs in having about 8 transverse brown bars on sides (vs. no dark bars on sides); no markings on snout and cheek (vs. blue speckles) and caudal fin strongly forked, inner edges of lobes with straight edges (vs. shallowly forked, inner edges of lobes convex).

Gymnocranius frenatus
Yellowsnout large-eye bream

Gymnocranius frenatus

Gymnocranius frenatus differs in having 3 or 4 oblique blue lines on snout and cheek (vs. blue speckles on snout and cheek); body silvery grey with 5–7 narrow, irregular dark bars (vs. silvery) and inner edge of caudal-fin lobes straight (vs. convex).

Gymnocranius grandoculis
Blue-lined large-eye bream

Gymnocranius grandoculis

Gymnocranius grandoculis differs in having a maximum length of up to 80 cm TL (vs. 45 cm TL); 5 or 6 irregular dark bars on sides of body for specimens <20 cm SL (vs. body silvery); horizontal, wavy blue lines on snout and cheek for specimens >20 cm SL (vs. blue speckles on snout and cheek) and fins often clear to yellow-orange (vs. reddish).

Gymnocranius microdon
Bluespotted large-eye bream

Gymnocranius microdon

Gymnocranius microdon differs in having vertically elongate blue spots on snout and cheek (vs. blue speckles) and caudal-fin tips pointed (vs. rounded). 

Gymnocranius euanus
Japanese large-eye bream

Gymnocranius euanus

Gymnocranius euanus differs in having 4½ scale rows between lateral line and base of middle dorsal-fin spines (vs. 5½).

Gymnocranius griseus
Grey large-eye bream

Gymnocranius griseus

Gymnocranius griseus differs in having dark narrow bars on body (vs. body silvery); no markings on snout and cheek (vs. blue speckles) and inner edge of caudal-fin lobes straight (vs. convex).

Gymnocranius obesus
Obese large-eye bream

Gymnocranius obesus differs in having dark narrow bars on body (vs. body silvery); no markings on snout and cheek (vs. blue speckles) and inner edge of caudal-fin lobes straight (vs. convex).

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